Quick charging method, power adapter and mobile terminal

ABSTRACT

The present disclosure provides a quick charging method, a power adapter, and a mobile terminal. The method includes: transmitting, by the power adapter, clock signal to the mobile terminal via a first data line of the USB interface in a process of that the power adapter is coupled to the mobile terminal, wherein the clock signal indicates a communication sequence between the power adapter and the mobile terminal; conducting, by the power adapter, a bidirectional communication with the mobile terminal via a second data line of the USB interface under control of the communication sequence, so as to determine to charge the mobile terminal in the quick charging mode; and adjusting, by the power adapter, a charging current of the power adapter to the charging current corresponding to the quick charging mode to charge the mobile terminal.

FIELD

The present disclosure relates to charging field, and more particularlyto a quick charging method, a power adapter, and a mobile terminal.

BACKGROUND

Presently, mobile terminals (e.g., smart phones) become more and morepopular with consumers. However, the power consumption of mobileterminals is great, thus mobile terminals need to be charged regularly.As the battery capacity of mobile terminals becomes greater and greater,correspondingly, the charging time becomes longer. How to realize quickcharging is a problem that needed to be solved instantly.

In the present technology, to achieve the purpose of quick charging, theoutput current of a power adapter is directly increased withoutconsideration of endurance of a mobile terminal, which will result in aphenomenon of overheating and even burnout of the mobile terminal, andreduces the lifespan of the mobile terminal.

SUMMARY

The embodiments of the present disclosure provide a quick chargingmethod, a power adapter, and a mobile terminal, which can increasesecurity of a quick charging process.

A first aspect provides a quick charging method. The method is appliedto a power adapter. The power adapter is coupled to a mobile terminalvia a USB interface. A power line of the USB interface is used for thepower adapter to charge the mobile terminal. The power adapter supportsa normal charging mode and a quick charging mode, and a charging currentcorresponding to the quick charging mode is greater than a chargingcurrent corresponding to the normal charging mode. The method comprises:transmitting, by the power adapter, clock signal to the mobile terminalvia a first data line of the USB interface in a process of that thepower adapter is coupled to the mobile terminal, wherein the clocksignal is used for indicating a communication sequence between the poweradapter and the mobile terminal; conducting, by the power adapter, abidirectional communication with the mobile terminal via a second dataline of the USB interface under control of the communication sequence todetermine to charge the mobile terminal in the quick charging mode; andadjusting, by the power adapter, a charging current of the power adapterto the charging current corresponding to the quick charging mode tocharge the mobile terminal.

In combination with the first aspect, in an implementation manner of thefirst aspect, the communication sequence comprises instructiontransmission time slots of the power adapter and instruction receptiontime slots of the power adapter, and the instruction transmission timeslots and the instruction reception time slots are alternativelygenerated. Conducting, by the power adapter, a bidirectionalcommunication with the mobile terminal via a second data line of the USBinterface under control of the communication sequence to determine tocharge the mobile terminal in the quick charging mode comprises:transmitting, by the power adapter, a first instruction to the mobileterminal via the second data line during the instruction transmissiontime slot of the power adapter, wherein the first instruction is usedfor querying the mobile terminal for whether or not to activate thequick charging mode; receiving, by the power adapter, a replyinstruction corresponding to the first instruction via the second dataline during the instruction reception time slot of the power adapter,wherein the reply instruction corresponding to the first instruction isused for indicating that the mobile terminal agrees to activate thequick charging mode; and determining, by the power adapter, to chargethe mobile terminal in the quick charging mode according to the replyinstruction corresponding to the first instruction.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, theinstruction transmission time slot of the power adapter comprises aplurality of clock periods, and each of the plurality of clock periodsis used for transmitting a 1-bit data.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, theinstruction transmission time slot of the power adapter comprises eightclock periods, and the first instruction comprises a 8-bit data.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, theinstruction reception time slot of the power adapter comprises aplurality of clock periods, and each of the plurality of clock periodsis used for receiving a 1-bit data.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, theinstruction reception time slot of the power adapter comprises ten clockperiods, and the reply instruction corresponding to the firstinstruction comprises a 10-bit data.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, the firstinstruction is an instruction of a quick charging communicationinstruction set of the power adapter, and instructions of the quickcharging communication instruction set have the same previous n bits.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, eachclock period of the clock signal comprises a low level of 10 μs and ahigh level of 500 μs.

In combination with the first aspect or any of the above implementationmanners, in another implementation manner of the first aspect, the firstdata line is a D+ data line of the USB interface, and the second dataline is a D− data line of the USB interface.

A second aspect provides a quick charging method. The method is appliedto a mobile terminal. The mobile terminal is coupled to a power adaptervia a USB interface. A power line of the USB interface is used for thepower adapter to charge the mobile terminal. The mobile terminalsupports a normal charging mode and a quick charging mode, and acharging current corresponding to the quick charging mode is greaterthan a charging current corresponding to the normal charging mode. Themethod comprises: receiving, by the mobile terminal, clock signal fromthe power adapter via a first data line of the USB interface in aprocess of that the mobile terminal is coupled to the power adapter,wherein the clock signal is used for indicating a communication sequencebetween the mobile terminal and the power adapter; conducting, by themobile terminal, a bidirectional communication with the power adaptervia a second data line of the USB interface under control of thecommunication sequence to cause the power adapter to determine to chargethe mobile terminal in the quick charging mode; and receiving, by themobile terminal, the charging current corresponding to the quickcharging mode from the power adapter to charge a battery of the mobileterminal.

In combination with the second aspect, in an implementation of thesecond aspect, the communication sequence comprises instructionreception time slots of the mobile terminal and instruction transmissiontime slots of the mobile terminal, and the instruction reception timeslots and the instruction transmission time slots are alternativelygenerated. Conducting, by the mobile terminal, a bidirectionalcommunication with the power adapter via a second data line of the USBinterface under control of the communication sequence to cause the poweradapter to determine to charge the mobile terminal in the quick chargingmode comprises: receiving, by the mobile terminal, a first instructionfrom the power adapter via the second data line during the instructionreception time slot of the mobile terminal, wherein the firstinstruction is used to query the mobile terminal for whether or not toactivate the quick charging mode; and transmitting, by the mobileterminal, a reply instruction corresponding to the first instruction tothe power adapter via the second data line during the instructiontransmission time slot of the power adapter, wherein the replyinstruction corresponding to the first instruction is used forindicating that the mobile terminal agrees to activate the quickcharging mode.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, theinstruction reception time slot of the mobile terminal comprises aplurality of clock periods, and each of the plurality of clock periodsis used for receiving a 1-bit data.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, theinstruction reception time slot of the mobile terminal comprises eightclock periods, and the first instruction comprises a 8-bit data.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, theinstruction transmission time slot of the mobile terminal comprises aplurality of clock periods, and each of the plurality of clock periodsis used for transmitting a 1-bit data.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, theinstruction transmission time slot of the mobile terminal comprises tenclock periods, and the reply instruction corresponding to the firstinstruction comprises a 10-bit data.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, thereply instruction corresponding to the first instruction is aninstruction of a quick charging communication instruction set of themobile terminal, and instructions of the quick charging communicationinstruction set have the same previous n bits.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, eachclock period of the clock signal comprises a low level of 10 μs and ahigh level of 500 μs.

In combination with the second aspect or any of the above implementationmanners, in another implementation manner of the second aspect, thefirst data line is a D+ data line of the USB interface, and the seconddata line is a D− data line of the USB interface.

A third aspect provides a power adapter. The power adapter is coupled toa mobile terminal via a USB interface. A power line of the USB interfaceis used for the power adapter to charge the mobile terminal. The poweradapter supports a normal charging mode and a quick charging mode, and acharging current corresponding to the quick charging mode is greaterthan a charging current corresponding to the normal charging mode. Thepower adapter comprises a communication unit configured to transmitclock signal to the mobile terminal via a first data line of the USBinterface in a process of that the power adapter is coupled to themobile terminal, wherein the clock signal is used for indicating acommunication sequence between the power adapter and the mobileterminal. The communication unit is further configured to conduct abidirectional communication with the mobile terminal via a second dataline of the USB interface under control of the communication sequence todetermine to charge the mobile terminal in the quick charging mode. Thepower adapter further comprises a current adjusting unit configured toadjust a charging current of the power adapter to the charging currentcorresponding to the quick charging mode to charge the mobile terminal.

In combination with the third aspect, in an implementation manner of thethird aspect, the communication sequence comprises instructiontransmission time slots of the power adapter and instruction receptiontime slots of the power adapter, and the instruction transmission timeslots and the instruction reception time slots are alternativelygenerated. The communication unit is configured to transmit a firstinstruction to the mobile terminal via the second data line during theinstruction transmission time slot of the power adapter, and the firstinstruction is used to query the mobile terminal for whether or not toactivate the quick charging mode. The communication unit is furtherconfigured to receive a reply instruction corresponding to the firstinstruction via the second data line during the instruction receptiontime slot of the power adapter, and the reply instruction correspondingto the first instruction is used for indicating that the mobile terminalagrees to activate the quick charging mode. The communication unit isfurther configured to determine to charge the mobile terminal in thequick charging mode according to the reply instruction corresponding tothe first instruction.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, theinstruction transmission time slot of the power adapter comprises aplurality of clock periods, and each of the plurality of clock periodsis used for transmitting a 1-bit data.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, theinstruction transmission time slot of the power adapter comprises eightclock periods, and the first instruction comprises a 8-bit data.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, theinstruction reception time slot of the power adapter comprises aplurality of clock periods, and each of the plurality of clock periodsis used for receiving a 1-bit data.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, theinstruction reception time slot of the power adapter comprises ten clockperiods, and the reply instruction corresponding to the firstinstruction comprises a 10-bit data.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, the firstinstruction is an instruction of a quick charging communicationinstruction set of the power adapter, and instructions of the quickcharging communication instruction set have the same previous n bits.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, eachclock period of the clock signal comprises a low level of 10 μs and ahigh level of 500 μs.

In combination with the third aspect or any of the above implementationmanners, in another implementation manner of the third aspect, the firstdata line is a D+ data line of the USB interface, and the second dataline is a D− data line of the USB interface.

A fourth aspect provides a mobile terminal. The mobile terminal iscoupled to a power adapter via a USB interface. A power line of the USBinterface is used for the power adapter to charge the mobile terminal.The mobile terminal supports a normal charging mode and a quick chargingmode, and a charging current corresponding to the quick charging mode isgreater than a charging current corresponding to the normal chargingmode. The mobile terminal includes a communication unit configured toreceive clock signal from the power adapter via a first data line of theUSB interface in a process of that the mobile terminal is coupled to thepower adapter, wherein the clock signal is used for indicating acommunication sequence between the mobile terminal and the poweradapter. The communication unit is further configured to conduct abidirectional communication with the power adapter via a second dataline of the USB interface under control of the communication sequence tocause the power adapter to determine to charge the mobile terminal inthe quick charging mode. The mobile terminal further comprises acharging unit configured to receive the charging current correspondingto the quick charging mode from the power adapter to charge a battery ofthe mobile terminal.

In combination with the fourth aspect, in an implementation manner ofthe fourth aspect, the communication sequence comprises instructionreception time slots of the mobile terminal and instruction transmissiontime slots of the mobile terminal, and the instruction reception timeslots and the instruction transmission time slots are alternativelygenerated. The communication unit is configured to receive a firstinstruction from the power adapter via the second data line during theinstruction reception time slot of the mobile terminal, and the firstinstruction is used to query the mobile terminal for whether or not toactivate the quick charging mode. The communication unit is furtherconfigured to transmit a reply instruction corresponding to the firstinstruction to the power adapter via the second data line during theinstruction transmission time slot of the mobile terminal, and the replyinstruction corresponding to the first instruction is used forindicating that the mobile terminal agrees to activate the quickcharging mode.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, theinstruction reception time slot of the mobile terminal comprises aplurality of clock periods, and each of the plurality of clock periodsis used for receiving a 1-bit data.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, theinstruction reception time slot of the mobile terminal comprises eightclock periods, and the first instruction comprises a 8-bit data.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, theinstruction transmission time slot of the mobile terminal comprises aplurality of clock periods, and each of the plurality of clock periodsis used for transmitting a 1-bit data.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, theinstruction transmission time slot of the mobile terminal comprises tenclock periods, and the reply instruction corresponding to the firstinstruction comprises a 10-bit data.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, thereply instruction corresponding to the first instruction is aninstruction of a quick charging communication instruction set of themobile terminal, and instructions of the quick charging communicationinstruction set have the same previous n bits.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, eachclock period of the clock signal comprises a low level of 10 μs and ahigh level of 500 μs.

In combination with the fourth aspect or any of the above implementationmanners, in another implementation manner of the fourth aspect, thefirst data line is a D+ data line of the USB interface, and the seconddata line is a D− data line of the USB interface.

In embodiments of the present disclosure, the power adapter does notincrease the charging current blindly to implement quick charging, butnegotiates with the mobile terminal via the bidirectional communicationwith the mobile terminal to determine whether or not the quick chargingmode can be adopted. Comparing with the present technology, the securityof the quick charging process is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

To better illustrate the technical solution of embodiments of thepresent disclosure, the following descriptions will briefly illustratethe accompanying drawings described in the embodiments. Obviously, thefollowing described accompanying drawings are some embodiments of thepresent disclosure. Those skilled in the art can obtain otheraccompanying drawings according to the described accompanying drawingswithout creative work.

FIG. 1 is a schematic flow chart of a quick charging method inaccordance with an embodiment of the present disclosure.

FIG. 2 is a schematic flow chart of a quick charging method inaccordance with another embodiment of the present disclosure.

FIG. 3 is a schematic view showing that a power adapter implements adata reception and transmission in accordance with an embodiment of thepresent disclosure.

FIG. 4 is a schematic view of a sequence of that the power adapterimplements a communication in accordance with an embodiment of thepresent disclosure.

FIG. 5 is a schematic view of a sequence of that the power adapterimplements a communication in accordance with another embodiment of thepresent disclosure.

FIG. 6 is a diagrammatic view of a structure of a power adapter inaccordance with an embodiment of the present disclosure.

FIG. 7 is diagrammatic view of a structure of a mobile terminal inaccordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

The technical solution of embodiments of the present disclosure will bedescribed clearly and completely in combination with the accompanyingdrawings of the embodiments of the present disclosure. Obviously, thedescribed embodiments are a part of embodiments of the presentdisclosure, and not all of the embodiments. According to the embodimentsof the present disclosure, other embodiments obtained by those skilledin the art without creative work all fall within the protection scope ofthe present disclosure.

FIG. 1 is a schematic flow chart of a quick charging method inaccordance with an embodiment of the present disclosure. The method isapplied to a power adapter. The power adapter is coupled to a mobileterminal via a universal serial bus (USB) interface. The USB interfacecan be a normal USB interface, and can also be a micro USB interface. Apower line of the USB interface is used for the power adapter to chargethe mobile terminal, and the power line of the USB interface can be aVBus line and/or grounding line. The power adapter supports a normalcharging mode and a quick charging mode, and a charging currentcorresponding to the quick charging mode is greater than a chargingcurrent corresponding to the normal charging mode. For example, thecharging current corresponding to the normal charging mode is generallyless than 2.5 A, and the charging current corresponding to the quickcharging mode can be greater than 3 A.

The method of FIG. 1 includes the following.

At block 110, the power adapter transmits clock signal to the mobileterminal via a first data line of the USB interface in a process of thatthe power adapter is coupled to the mobile terminal, and the clocksignal is used to indicate a communication sequence between the poweradapter and the mobile terminal.

It should be understood that the power adapter actively transmits theclock signal to the mobile terminal, and keeps transmission of the clocksignal during the whole process of that the power adapter is coupled tothe mobile terminal.

At block 120, the power adapter conducts a bidirectional communicationwith the mobile terminal via a second data line of the USB interfaceunder control of the communication sequence, so as to determine tocharge the mobile terminal in the quick charging mode.

At block 130, the power adapter adjusts a charging current of the poweradapter to the charging current corresponding to the quick charging modeto charge the mobile terminal.

In detail, the power adapter can record the charging currentcorresponding to the quick charging mode in advance. When it isdetermined that the quick charging mode is adopted to charge the mobileterminal, the charging current of the power adapter is directly adjustedto the charging current corresponding to the quick charging mode. Or,the power adapter can negotiate with the mobile terminal via thebidirectional communication to determine the charging currentcorresponding to the quick charging mode. After negotiation, thecharging current is adjusted.

In embodiments of the present disclosure, the power adapter does notincrease the charging current blindly to implement quick charging, butnegotiates with the mobile terminal via the bidirectional communicationwith the mobile terminal to determine whether or not the quick chargingmode can be adopted. Comparing with the present technology, the securityof the quick charging process is improved.

Optionally, in an embodiment, the communication sequence includesinstruction transmission time slots of the power adapter and instructionreception time slots of the power adapter, and the instructiontransmission time slots and the instruction reception time slots arealternatively generated. Conducting, by the power adapter, abidirectional communication with the mobile terminal via a second dataline of the USB interface under control of the communication sequence todetermine to charge the mobile terminal in the quick charging mode,includes: transmitting, by the power adapter, a first instruction to themobile terminal via the second data line during the instructiontransmission time slot of the power adapter, wherein the firstinstruction is used to query the mobile terminal for whether or not toactivate the quick charging mode; receiving, by the power adapter, areply instruction corresponding to the first instruction via the seconddata line during the instruction reception time slot of the poweradapter, wherein the reply instruction corresponding to the firstinstruction is used for indicating that the mobile terminal agrees toactivate the quick charging mode; and determining, by the power adapter,to charge the mobile terminal in the quick charging mode according tothe reply instruction corresponding to the first instruction.

Optionally, in an embodiment, the instruction transmission time slot ofthe power adapter includes a number of clock periods, and each clockperiod is used for transmitting a 1-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe power adapter includes eight clock periods, and the firstinstruction includes a 8-bit data.

Optionally, in an embodiment, the instruction reception time slot of thepower adapter includes a number of clock periods, and each clock periodis used for receiving 1-bit data.

Optionally, in an embodiment, the instruction reception time slot of thepower adapter includes ten clock periods, and the reply instructioncorresponding to the first instruction includes a 10-bit data.

Optionally, in an embodiment, the first instruction is an instruction ofthe quick charging communication instruction set of the power adapter,and instructions of the quick charging communication instruction sethave the same previous n bits.

Optionally, in an embodiment, each clock period of the clock signalincludes a low level of 10 us and a high level of 500 us.

Optionally, in an embodiment, the first data line is a D+ data line ofthe USB interface, and the second data line is a D− data line of the USBinterface.

The above description in combination with FIG. 1 describes the quickcharging method of the embodiments of the present disclosure executed bythe power adapter. The following description in combination with FIG. 2will describes the quick charging method of the embodiments of thepresent disclosure executed by the mobile terminal.

It can be understood that interaction and relevance properties andfunctions of the power adapter and the mobile terminal described in thequick charging method executed by the mobile terminal corresponds to thedescription of the quick charging method executed by the power adapter.For simplicity, repeated description will be omitted appropriately.

FIG. 2 is a schematic flow chart of a quick charging method inaccordance with an embodiment of the present disclosure. The methodillustrated in FIG. 2 is applied to a mobile terminal. The mobileterminal is coupled to a power adapter via a USB interface. A power lineof the USB interface is used for the power adapter to charge the mobileterminal. The mobile terminal supports a normal charging mode and aquick charging mode, and a charging current corresponding to the quickcharging mode is greater than a charging current corresponding to thenormal charging mode. The method of FIG. 2 includes the following.

At block 210, the mobile terminal receives clock signal from the poweradapter via a first data line of the USB interface in a process of thatthe mobile terminal is coupled to the power adapter, and the clocksignal is used to indicate a communication sequence between the mobileterminal and the power adapter.

At block 220, the mobile terminal conducts a bidirectional communicationwith the power adapter via a second data line of the USB interface undercontrol of the communication sequence, so as to cause the power adapterto determine to charge the mobile terminal in the quick charging mode.

At block 230, the mobile terminal receives the charging currentcorresponding to the quick charging mode from the power adapter tocharge a battery of the mobile terminal.

In embodiments of the present disclosure, the power adapter does notincrease the charging current blindly to implement quick charging, butnegotiates with the mobile terminal via the bidirectional communicationwith the mobile terminal to determine whether or not the quick chargingmode can be adopted. Comparing with related arts, the security of thequick charging process is improved.

Optionally, in an embodiment, the communication sequence includesinstruction reception time slots of the mobile terminal and instructiontransmission time slots of the mobile terminal, and the instructionreception time slots and the instruction reception time slots arealternatively generated. Conducting, by the mobile terminal, thebidirectional communication with the power adapter via a second dataline of the USB interface under control of the communication sequence tocause the power adapter to determine to charge the mobile terminal inthe quick charging mode includes: receiving, by the mobile terminal, afirst instruction from the power adapter via the second data line duringthe instruction reception time slot of the mobile terminal, wherein thefirst instruction is used to query the mobile terminal for whether ornot to activate the quick charging mode; transmitting, by the mobileterminal, a reply instruction corresponding to the first instruction viathe second data line during the instruction transmission time slot ofthe mobile terminal, wherein the reply instruction corresponding to thefirst instruction is used for indicating that the mobile terminal agreesto activate the quick charging mode.

Optionally, in an embodiment, the instruction reception time slot of themobile terminal includes a number of clock periods, and each clockperiod is used for receiving a 1-bit data.

Optionally, in an embodiment, the instruction reception time slot of themobile terminal includes eight clock periods, and the first instructionincludes a 8-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe mobile terminal includes a number of clock periods, and each clockperiod is used for transmitting 1-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe mobile terminal includes ten clock periods, and the replyinstruction corresponding to the first instruction includes a 10-bitdata.

Optionally, in an embodiment, the reply instruction corresponding to thefirst instruction is an instruction of the quick charging communicationinstruction set of the mobile terminal, and instructions of the quickcharging communication instruction set have the same previous n bits.

Optionally, in an embodiment, each clock period of the clock signalincludes a low level of 10 us and a high level of 500 us.

Optionally, in an embodiment, the first data line is a D+ data line ofthe USB interface, and the second data line is a D− data line of the USBinterface.

The following will describe embodiments of the present disclosure morespecifically in combination with detailed examples. It should be notedthat examples illustrated in FIGS. 3-5 are just used to help thoseskilled in the art to understand the embodiments of the presentdisclosure, and not used to limit the embodiments of the presentdisclosure to detailed values or detailed scenarios which are shown inthe examples. Apparently, those skilled in the art can make variousequivalent modification or change according to the examples shown inFIGS. 3-5, and such modification or change shall fall within the scopeof the embodiments of the present disclosure.

Firstly, the quick charging communication instruction set of the poweradapter and the mobile terminal can be defined. For example, the quickcharging communication instruction set is shown in the table 1.

TABLE 1 Quick charging communication instruction set Instruction 1:requesting for quick charging Power adapter −> Mobile terminal 101010000xA8 Mobile terminal −> Power adapter 101XYYYYYY X: 1 −> Agree 0 −>Disagree, Path impedance = YYYYYY*5(mΩ) Instruction 2: querying whetheror not a voltage of the power adapter is proper Power adapter −> Mobileterminal 10100100 0xA4 Mobile terminal −> Power adapter 1010XX0000 XX:11 −> Proper 10 −> High 01 −> Low 00 −> Error Instruction 3: queryingfor a maximum charging current which is currently supported by themobile terminal Power adapter −> Mobile terminal 10100110 0xA6 Mobileterminal −> Power adapter 1010XXXXXX Maximum charging current currentlysupported by the mobile terminal = 3000 + (XXXXXX*250)(mA) Instruction4: querying for a current voltage of a battery of the mobile terminalPower adapter −> Mobile terminal 10100010 0xA2 Mobile terminal −> Poweradapter 101XYYYYYY X: 1 −> Being charged 0 −> Uncharged, Battery voltage= 3404 + (YYYYYY*16)(mV) Instruction 5: informing the mobile terminalthat USB connection is poor and quick charging should be stopped Poweradapter −> Mobile terminal 10110010 0xB2 Mobile terminal −> Poweradapter NONE

From table 1, it can be seen that in each communication the poweradapter firstly transmits a 8-bit data, and then the mobile terminalreturns a 10-bit data. When the power adapter transmits a data, thepower adapter can firstly transmit most significant bit (MSB).Similarly, when the power adapter receives a data, the power adapterfirstly receives MSB. The clock signal for data transmission and datareception of the power adapter can be provided by the power adapter.

When the power adapter transmits a data, the power adapter transmitseach bit of the data before transmitting the clock interrupt signal,which can guarantee the accuracy of the data received by the mobileterminal. When the power adapter receives a data, the power adapter canfirstly transmit the clock interrupt signal, and then receive each bitof the data after a certain time, which can guarantee the accuracy andreliability of the data received by the power adapter.

FIG. 3 is a schematic view showing that the power adapter implements adata reception and data transmission in accordance with an embodiment ofthe present disclosure. For FIG. 3, there are a number of methods forparsing a data to determine whether or not the data is valid. Forexample, previous n bits of a data can be defined as 101 in advance.When previous 3 bits of a data received by the power adapter is not 101,the data is determined as an invalid data, and communication fails. Or,a received data is defined to include 10 bits in advance. If a receiveddata does not include 10 bits, the received data is determined as aninvalid data, and communication fails.

FIG. 4 is a schematic view of a sequence of that the power adapterimplements a communication in accordance with an embodiment of thepresent disclosure. From FIG. 4, a relationship between a communicationsequence indicated by the clock signal which is transmitted by the D+data line and data signal transmitted by the D− data line is shown. FIG.5 illustrates a detailed example. In FIG. 5, after the power adaptertransmits the instruction 10101000 to the mobile terminal, the poweradapter receives the reply instruction 1011001111 from the mobileterminal.

In combination with FIGS. 1-5, the above describes the quick chargingmethod of the embodiments of the present disclosure. Referring to FIGS.6-7, the following will specifically describe the power adapter and themobile terminal of the embodiments of the present disclosure. It can beunderstood that the power adapter of FIG. 6 can implement various stepsexecuted by the power adapter of FIGS. 1-5, and the mobile terminal ofFIG. 7 can implement various steps executed by the mobile terminal ofFIGS. 1-5. To avoid repetition, detailed description will be omitted.

FIG. 6 is a schematic structural diagram of a power adapter inaccordance with an embodiment of the present disclosure. A power adapter600 in FIG. 6 is coupled to a mobile terminal via a USB interface. Apower line of the USB interface is used for the power adapter 600 tocharge the mobile terminal. The power adapter 600 supports a normalcharging mode and a quick charging mode, and a charging currentcorresponding to the quick charging mode is greater than a chargingcurrent corresponding to the normal charging mode. The power adapter 600includes the following.

A communication circuit 610 is configured to transmit clock signal tothe mobile terminal via a first data line of the USB interface in aprocess of that the power adapter 600 is coupled to the mobile terminal,and the clock signal is used to indicate a communication sequencebetween the power adapter 600 and the mobile terminal. The communicationcircuit 610 is further configured to conduct a bidirectionalcommunication with the mobile terminal via a second data line of the USBinterface under control of the communication sequence, so as todetermine to charge the mobile terminal in the quick charging mode.

A current adjusting circuit 620 is configured to adjust a chargingcurrent of the power adapter to the charging current corresponding tothe quick charging mode to charge the mobile terminal.

In embodiments of the present disclosure, the power adapter does notincrease the charging current blindly to implement quick charging, butnegotiates with the mobile terminal via the bidirectional communicationwith the mobile terminal to determine whether or not the quick chargingmode can be adopted. Comparing with the related art, the security of thequick charging process is improved.

Optionally, in an embodiment, the communication sequence includesinstruction transmission time slots of the power adapter 600 andinstruction reception time slots of the power adapter 600, and theinstruction transmission time slots and the instruction reception timeslots are alternatively generated. The communication circuit 610 isconfigured to transmit a first instruction to the mobile terminal viathe second data line during the instruction transmission time slot ofthe power adapter 600, and the first instruction is used to query themobile terminal for whether or not to activate the quick charging mode.The communication circuit 610 is further configured to receive a replyinstruction corresponding to the first instruction via the second dataline during the instruction reception time slot of the power adapter600, and the reply instruction corresponding to the first instruction isused for indicating that the mobile terminal agrees to activate thequick charging mode. The communication circuit 610 is further configuredto determine to charge the mobile terminal in the quick charging modeaccording to the reply instruction corresponding to the firstinstruction.

Optionally, in an embodiment, the instruction transmission time slot ofthe power adapter 600 includes a number of clock periods, and each clockperiod is used for transmitting a 1-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe power adapter 600 includes eight clock periods, and the firstinstruction includes a 8-bit data.

Optionally, in an embodiment, the instruction reception time slot of thepower adapter 600 includes a number of clock periods, and each clockperiod is used for receiving a 1-bit data.

Optionally, in an embodiment, the instruction reception time slot of thepower adapter 600 includes ten clock periods, and the reply instructioncorresponding to the first instruction includes a 10-bit data.

Optionally, in an embodiment, the first instruction is an instruction ofthe quick charging communication instruction set of the power adapter600, and instructions of the quick charging communication instructionset have the same previous n bits.

Optionally, in an embodiment, each clock period of the clock signalincludes a low level of 10 us and a high level of 500 us.

Optionally, in an embodiment, the first data line is a D+ data line ofthe USB interface, and the second data line is a D− data line of the USBinterface.

FIG. 7 is a schematic block diagram of a mobile terminal in accordancewith an embodiment of the present disclosure. A mobile terminal 700 inFIG. 7 is coupled to a power adapter via a USB interface. A power lineof the USB interface is used for the power adapter to charge the mobileterminal 700. The mobile terminal 700 supports a normal charging modeand a quick charging mode, and a charging current corresponding to thequick charging mode is greater than a charging current corresponding tothe normal charging mode. The mobile terminal 700 includes thefollowing.

A communication circuit 710 is configured to receive clock signal fromthe power adapter via a first data line of the USB interface in aprocess of that the mobile terminal 700 is coupled to the power adapter,and the clock signal is used to indicate a communication sequencebetween the mobile terminal 700 and the power adapter. The communicationcircuit 710 is further configured to conduct a bidirectionalcommunication with the power adapter via a second data line of the USBinterface under control of the communication sequence, so as to causethe power adapter to determine to charge the mobile terminal 700 in thequick charging mode.

A charging circuit 720 is configured to receive the charging currentcorresponding to the quick charging mode from the power adapter tocharge a battery of the mobile terminal 700.

In embodiments of the present disclosure, the power adapter does notincrease the charging current blindly to implement quick charging, butnegotiates with the mobile terminal via the bidirectional communicationwith the mobile terminal to determine whether or not the quick chargingmode can be adopted. Comparing to the present technology, the securityof the quick charging process is improved.

Optionally, in an embodiment, the communication sequence includesinstruction reception time slots of the mobile terminal 700 andinstruction transmission time slots of the mobile terminal 700, and theinstruction reception time slots and the instruction transmission timeslots are alternatively generated. The communication circuit 710 isconfigured to receive a first instruction from the power adapter via thesecond data line during the instruction reception time slot of themobile terminal 700, and the first instruction is used to query themobile terminal 700 for whether or not to activate the quick chargingmode. The communication circuit 710 is further configured to transmit areply instruction corresponding to the first instruction to the poweradapter via the second data line during the instruction transmissiontime slot of the mobile terminal 700, and the reply instructioncorresponding to the first instruction is used for indicating that themobile terminal 700 agrees to activate the quick charging mode.

Optionally, in an embodiment, the instruction reception time slot of themobile terminal 700 includes a number of clock periods, and each clockperiod is used for receiving a 1-bit data.

Optionally, in an embodiment, the instruction reception time slot of themobile terminal 700 includes eight clock periods, and the firstinstruction includes a 8-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe mobile terminal 700 includes a number of clock periods, and eachclock period is used for transmitting a 1-bit data.

Optionally, in an embodiment, the instruction transmission time slot ofthe mobile terminal 700 includes ten clock periods, and the replyinstruction corresponding to the first instruction includes a 10-bitdata.

Optionally, in an embodiment, the reply instruction corresponding to thefirst instruction is an instruction of the quick charging communicationinstruction set of the mobile terminal 700, and instructions of thequick charging communication instruction set have the same previous nbits.

Optionally, in an embodiment, each clock period of the clock signalincludes a low level of 10 us and a high level of 500 us.

Optionally, in an embodiment, the first data line is a D+ data line ofthe USB interface, and the second data line is a D− data line of the USBinterface.

Those skilled in the art should appreciate that units and programmingsteps of various examples described in the embodiments of the presentdisclosure can be realized by electronic hardware or a combination ofcomputer software and electronic hardware. Whether these functions arerealized by hardware or software depends on particular applications anddesign constraint conditions. For each particular application,professionals can employ different methods to realize describedfunctions, but this realization should fall into the scope of thepresent disclosure.

For convenience and simplicity, those skilled in the art can clearlyunderstand that when the specific work processes of the above describedsystems, devices, and units are described, the corresponding processesof the above method embodiments can be referred, which will not berepeated herein.

In several embodiments provided by the present disclosure, it can beunderstood that the disclosed systems, devices, and methods can beimplemented by other manners. For example, the device embodimentsdescribed above are only schematic. For example, the units are dividedaccording to logic functions and can be divided by another manner in anactual implementation. For example, several units or assemblies can becombined or can be integrated into another system, or some features canbe ignored, or are not executed. Another point is that mutual couplingor direct coupling or communication connection shown or discussed hereincan be indirect coupling or communication connection through certaininterfaces, devices, or units, and can be in the form of electricity,machine, or other.

The units illustrated as separate units can be or cannot be physicallyseparated, and components shown in units can be or cannot be physicalunits, that is, can be in a place, or can be distributed in severalnetwork units. A part of or all of the units can be selected accordingto actual need to realize the purpose of the solution of theembodiments.

Additionally, various functional units in the embodiments of the presentdisclosure can be integrated into one processing unit, or variousfunctional units can exist alone, or two or more units can be integratedinto one unit.

If the functions can be realized in the form of software functionalunits and can be sold or used as stand-alone products, they can bestored in a computer-readable storage medium. Based on suchunderstanding, the technical solution of the present disclosure or thepart that contributes to the existing technology or a part of thetechnical solution can be embodied in the form of a software product.The computer software product can be stored in a storage medium, andinclude a plurality of instructions configured to direct a computerdevice (personal computer, server, or network device) to execute all ofor a part of steps of various embodiments of the present disclosure. Thestorage mediums described above include a U disk, a mobile disk, aread-only memory (ROM), a random access memory (RAM), a disc, a compactdisc, or other medium storing program codes.

The foregoing descriptions are merely preferred embodiments of thepresent disclosure, rather than limiting the present disclosure. Any oneskilled in the art can easily make change or alterations within thetechnology range of the present disclosure, and those change oralterations shall fall within the protection scope of the presentdisclosure. Therefore, the protection scope of the present disclosureshall be limited by the protection scope of the claims.

1. A quick charging method, the method comprising: coupling a poweradapter to a mobile terminal via a Universal Serial Bus (USB) interface,a power line of the USB interface being used for the power adapter tocharge the mobile terminal, the power adapter supporting a normalcharging mode and a quick charging mode, a charging currentcorresponding to the quick charging mode being greater than a chargingcurrent corresponding to the normal charging mode; transmitting, by thepower adapter, clock signal to the mobile terminal via a first data lineof the USB interface in a process of that the power adapter is coupledto the mobile terminal, wherein the clock signal indicates acommunication sequence between the power adapter and the mobileterminal; conducting, by the power adapter, a bidirectionalcommunication with the mobile terminal via a second data line of the USBinterface under control of the communication sequence, so as todetermine to charge the mobile terminal in the quick charging mode; andadjusting, by the power adapter, a charging current of the power adapterto the charging current corresponding to the quick charging mode tocharge the mobile terminal.
 2. The method of claim 1, wherein thecommunication sequence comprises instruction transmission time slots ofthe power adapter and instruction reception time slots of the poweradapter, and the instruction transmission time slots and the instructionreception time slots are alternatively generated; wherein conducting, bythe power adapter, a bidirectional communication with the mobileterminal via a second data line of the USB interface under control ofthe communication sequence to determine to charge the mobile terminal inthe quick charging mode comprises: transmitting, by the power adapter, afirst instruction to the mobile terminal via the second data line duringthe instruction transmission time slot of the power adapter, wherein thefirst instruction is used for querying the mobile terminal for whetheror not to activate the quick charging mode; receiving, by the poweradapter, a reply instruction corresponding to the first instruction viathe second data line during the instruction reception time slot of thepower adapter, wherein the reply instruction corresponding to the firstinstruction indicates that the mobile terminal agrees to activate thequick charging mode; and determining, by the power adapter, to chargethe mobile terminal in the quick charging mode according to the replyinstruction corresponding to the first instruction.
 3. The method ofclaim 2, wherein the instruction transmission time slot of the poweradapter comprises a plurality of clock periods, and each of theplurality of clock periods is used for transmitting a 1-bit data.
 4. Themethod of claim 3, wherein the instruction transmission time slot of thepower adapter comprises eight clock periods, and the first instructioncomprises a 8-bit data.
 5. The method of claim 2, wherein theinstruction reception time slot of the power adapter comprises aplurality of clock periods, and each of the plurality of clock periodsis used for receiving a 1-bit data.
 6. The method of claim 5, whereinthe instruction reception time slot of the power adapter comprises tenclock periods, and the reply instruction corresponding to the firstinstruction comprises a 10-bit data.
 7. The method of claim 1, whereinthe first instruction is an instruction of a quick chargingcommunication instruction set of the power adapter, and instructions ofthe quick charging communication instruction set have the same previousn bits.
 8. The method of claim 1, wherein each clock period of the clocksignal comprises a low level of 10 μs and a high level of 500 μs.
 9. Themethod of claim 1, wherein the first data line is a D+ data line of theUSB interface, and the second data line is a D− data line of the USBinterface. 10-18. (canceled)
 19. A power adapter, the power adapterbeing configured to be coupled to a mobile terminal via a UniversalSerial Bus (USB) interface, a power line of the USB interface being usedfor the power adapter to charge the mobile terminal, the power adaptersupporting a normal charging mode and a quick charging mode, a chargingcurrent corresponding to the quick charging mode being greater than acharging current corresponding to the normal charging mode, the poweradapter comprising: a communication circuit configured to transmit clocksignal to the mobile terminal via a first data line of the USB interfacein a process of that the power adapter is coupled to the mobileterminal, wherein the clock signal indicates a communication sequencebetween the power adapter and the mobile terminal; and the communicationcircuit is further configured to conduct a bidirectional communicationwith the mobile terminal via a second data line of the USB interfaceunder control of the communication sequence, so as to determine tocharge the mobile terminal in the quick charging mode; and a currentadjusting circuit configured to adjust a charging current of the poweradapter to the charging current corresponding to the quick charging modeto charge the mobile terminal.
 20. The power adapter of claim 19,wherein the communication sequence comprises instruction transmissiontime slots of the power adapter and instruction reception time slots ofthe power adapter, and the instruction transmission time slots and theinstruction reception time slots are alternatively generated; thecommunication circuit is configured to transmit a first instruction tothe mobile terminal via the second data line during the instructiontransmission time slot of the power adapter, and the first instructionis used to query the mobile terminal for whether or not to activate thequick charging mode; the communication circuit is further configured toreceive a reply instruction corresponding to the first instruction viathe second data line during the instruction reception time slot of thepower adapter, and the reply instruction corresponding to the firstinstruction indicates that the mobile terminal agrees to activate thequick charging mode; and the communication circuit is further configuredto determine to charge the mobile terminal in the quick charging modeaccording to the reply instruction corresponding to the firstinstruction.
 21. The power adapter of claim 20, wherein the instructiontransmission time slot of the power adapter comprises a plurality ofclock periods, and each of the plurality of clock periods is used fortransmitting a 1-bit data.
 22. The power adapter of claim 21, whereinthe instruction transmission time slot of the power adapter compriseseight clock periods, and the first instruction comprises a 8-bit data.23. The power adapter of claim 20, wherein the instruction receptiontime slot of the power adapter comprises a plurality of clock periods,and each of the plurality of clock periods is used for receiving a 1-bitdata.
 24. The power adapter of claim 23, wherein the instructionreception time slot of the power adapter comprises ten clock periods,and the reply instruction corresponding to the first instructioncomprises a 10-bit data.
 25. The power adapter of claim 19, wherein thefirst instruction is an instruction of a quick charging communicationinstruction set of the power adapter, and instructions of the quickcharging communication instruction set have the same previous n bits.26. The power adapter of claim 19, wherein each clock period of theclock signal comprises a low level of 10 μs and a high level of 500 μs.27. The power adapter of claim 19, wherein the first data line is a D+data line of the USB interface, and the second data line is a D− dataline of the USB interface.
 28. A mobile terminal, the mobile terminalbeing configured to be coupled to a power adapter via a Universal SerialBus (USB) interface, a power line of the USB interface being used forthe power adapter to charge the mobile terminal, the mobile terminalsupporting a normal charging mode and a quick charging mode, a chargingcurrent corresponding to the quick charging mode being greater than acharging current corresponding to the normal charging mode, the mobileterminal comprising: a communication circuit configured to receive clocksignal from the power adapter via a first data line of the USB interfacein a process of that the mobile terminal is coupled to the poweradapter, wherein the clock signal indicates a communication sequencebetween the mobile terminal and the power adapter; the communicationcircuit is further configured to conduct a bidirectional communicationwith the power adapter via a second data line of the USB interface undercontrol of the communication sequence, so as to cause the power adapterto determine to charge the mobile terminal in the quick charging mode;and a charging circuit configured to receive the charging currentcorresponding to the quick charging mode from the power adapter tocharge a battery of the mobile terminal.
 29. The mobile terminal ofclaim 28, wherein the communication sequence comprises instructionreception time slots of the mobile terminal and instruction transmissiontime slots of the mobile terminal, and the instruction reception timeslots and the instruction transmission time slots are alternativelygenerated; the communication circuit is configured to receive a firstinstruction from the power adapter via the second data line during theinstruction reception time slot of the mobile terminal, and the firstinstruction is used to query the mobile terminal for whether or not toactivate the quick charging mode; and the communication circuit isfurther configured to transmit a reply instruction corresponding to thefirst instruction to the power adapter via the second data line duringthe instruction transmission time slot of the power adapter, and thereply instruction corresponding to the first instruction indicates thatthe mobile terminal agrees to activate the quick charging mode. 30-36.(canceled)